head to head
Neither is simply harder - they are hard in different places. Cube Escape: Paradox demands more variance; Fallout: New Vegas demands more execution.

Optimization · Pure Optimization
A surreal escape-room chapter of the Rusty Lake saga where a detective pieces his memory back together.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Cube Escape: Paradox leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Cube Escape: Paradox
Pointing and clicking only; no physical ceiling.
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Cube Escape: Paradox
Everything is scripted; nothing models you.
Fallout: New Vegas
Scripted factions and enemies
Cube Escape: Paradox leans clearly harder on variance.
Cube Escape: Paradox
Cryptic hidden clues dominate first playthrough, then converge.
Fallout: New Vegas
Some loot and crit RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Cube Escape: Paradox
Fixed puzzle chains in one room are the whole game.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.